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RZFL32, 50 automatic backwash filter

Classification:

Self-cleaning filter

Keywords: Filter | Valve Remote Control Device | Marine Module | Hydraulic

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Product Description

Commodity name: RZFL32, 50 automatic backwash filter

Overview Overview

The cleanliness of the liquid fuel, lubricant or coolant used is critical for equipment that needs to operate without trouble for a long time. The self-cleaning filter adopts a multi-filter element structure, which is suitable for a variety of liquid media such as fuel, lubricating oil and emulsion and ensures sufficient filtering capacity. In addition, this series of filters can simultaneously filter and automatically backwash while maintaining a constant system pressure, thus achieving uninterrupted operation under unattended conditions.
For equipment that requires long-term trouble-free operation, the cleanliness of the liquid fuel, lubricant, or coolant used is critical. The self-cleaning filter uses a multi-element structure, suitable for a variety of liquid media such as fuel, lubricant, and emulsion, and ensures sufficient filtration capacity. And this series of filters can simultaneously perform filtration and automatic backwash while maintaining constant system pressure, enabling unattended, uninterrupted operation.

Technical parameters Technical parameter

Model Type	Path DN	Working pressure Working Pressure（MPa）	Working temperature Working Temperature (℃)	Number of filter chambers Qty of chambers		Use area of filter element Filter area ( cm2)
				Total Total	使用数working chambers
RZFL32	32	≤ 1.6	≤ 150	2	1	1100
RZFL50	50			2	1	2600

Design Principles Design principle

The RZFL32, 50 filter contains two separate filter chambers, each equipped with its own filter element assembly to provide a large filtration area.
The design of multiple filter chambers of the filter provides the condition that when the filter element of one filter chamber is full of dirt, another clean filter chamber takes over its operation. Through the electric control box to control the actuator, solenoid valve and other components, backwashing action can be triggered according to the pressure difference or time, the process is very fast, thorough, to ensure that the filtration process and backwashing process synchronous, independent of each other.
The two filter chambers of the filter take turns to filter and backwash, and the design of the double-chamber filter constitutes a circular motion pattern throughout the filtration process.
The RZFL32 and 50 filters include two separate filter chambers, each equipped with its own filter element assembly to provide a large filtering area.
The design of multiple filter chambers in the filter provides the condition where when the filter element in one chamber becomes clogged with dirt, another clean chamber takes over its operation. The control of the actuator, solenoid valve, and other components is through the electric control box. The backwash action can be triggered by pressure difference or time, and the process is extremely fast and thorough, ensuring that the filtering process and backwash process are synchronized and independent of each other.
The two filter chambers of the filter take turns in filtering and backwashing, and the design of a dual-chamber filter constitutes a cyclic mode of operation throughout the entire filtering process.

Filter contour

RZFL32

RZFL50

Work process Working process

1. Normal filtering state
The filtered liquid enters the inlet (①) at the bottom of the filter, flows through the shell (②), and flows into the filter element (③) from the outside to the inside, in which impurities greater than the specified filtering accuracy are retained by the filter screen, and the filtered clean liquid flows out from the outlet (④) at the upper end of the filter.
2. Backwash status
With the increase of the working time of the filter, more and more impurities are trapped on the filter element, which leads to the rising pressure difference between the inlet and outlet of the filter. When the pressure difference reaches a certain value, the differential pressure transmitter will send a signal, the actuator (⑤) will act, the rotary valve (⑥) will turn from the spare filter chamber to the filter chamber to be cleaned, and the slide valve (⑦) will move upward, the backwashing compressed air is released in the air storage chamber (⑧) to promote the liquid in the filter chamber to flow reversely through the filter element, wash away the dirt adhered to the outside of the filter screen, flow through the lower part of the rotary valve, and discharge from the open sewage outlet (⑨).
After a short period of backwashing, the slide valve is reset, and the sewage outlet and backwashing air inlet are closed. The filter chamber emptied by backwashing is resupplied and waits for the next cycle of backwashing.
This type of filter is also equipped with a heating chamber, which allows steam or hot oil to flow through the heating chamber while filtering heavy fuel oil, thus providing a heat preservation function for the inside of the filter.

1. Normal filtering condition
Filtered liquid enters the filter at the bottom inlet (1), flows through the shell (2), and is filtered from the outside to the inside through the filter element (3). Impurities larger than the specified filtering accuracy are retained by the filter net, and the cleaned liquid exits from the upper end of the filter at the outlet (4).
2.Backwash State
As the filter works for a long time, more and more impurities are trapped on the filter element, causing the pressure difference between the inlet and outlet of the filter to continue to rise. When the pressure difference reaches a certain specific value, the pressure difference transmitter sends a signal, the actuator (5) operates, and the rotary valve (6) transfers from the backup filter chamber to the filter chamber that needs to be cleaned. The slide valve (7) moves upward, releasing compressed air in the gas storage chamber (8) to make the liquid in the filter chamber flow reversely through the filter element, washing off the dirt adhering to the outside of the filter net. The liquid flows through the lower part of the rotary valve and is discharged from the open drain port (9).
After a short period of backwash, the slide valve returns to its original position, closing both the drain port and backwash air inlet. The filter chamber that has been drained and washed re-fills with liquid and waits for the next backwash cycle.
This type of filter is also equipped with a heating chamber that can be used to heat filter oil or other fuels while filtering heavy fuel oil, keeping the interior of the filter warm.